/* =========================================================================
   Web Pulse — Base Design Tokens
   ========================================================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

:root, [data-theme="dark"] {
  /* Surfaces */
  --color-bg: #0a0e0e;
  --color-surface: #101515;
  --color-surface-2: #151b1b;
  --color-surface-offset: #1a2121;
  --color-border: rgba(255, 255, 255, 0.09);
  --color-divider: rgba(255, 255, 255, 0.06);

  /* Text */
  --color-text: #e7edec;
  --color-text-muted: #8b9c9c;
  --color-text-faint: #566666;
  --color-text-inverse: #0a0e0e;

  /* Accent — "signal" teal (active / live) */
  --color-primary: #3fd1a6;
  --color-primary-strong: #63e0bb;
  --color-primary-highlight: rgba(63, 209, 166, 0.14);

  /* Secondary accent — inactive / dormant */
  --color-dormant: #5b7075;
  --color-dormant-highlight: rgba(91, 112, 117, 0.22);

  /* Warning / delta down */
  --color-amber: #d99a4a;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);

  --font-display: 'General Sans', 'Inter', sans-serif;
  --font-body: 'General Sans', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', monospace;
}

[data-theme="light"] {
  --color-bg: #f4f7f6;
  --color-surface: #ffffff;
  --color-surface-2: #eef2f1;
  --color-surface-offset: #e6ebea;
  --color-border: rgba(10, 20, 20, 0.09);
  --color-divider: rgba(10, 20, 20, 0.06);

  --color-text: #0e1716;
  --color-text-muted: #566665;
  --color-text-faint: #93a3a2;
  --color-text-inverse: #f4f7f6;

  --color-primary: #128f74;
  --color-primary-strong: #0d7660;
  --color-primary-highlight: rgba(18, 143, 116, 0.10);

  --color-dormant: #6b7c80;
  --color-dormant-highlight: rgba(107, 124, 128, 0.14);

  --color-amber: #b5762a;

  --shadow-sm: 0 1px 2px rgba(20, 30, 30, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 30, 30, 0.08);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  font-size: clamp(0.9375rem, 0.9rem + 0.15vw, 1rem);
  line-height: 1.55;
  transition: background 220ms ease, color 220ms ease;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }

.tabular { font-variant-numeric: tabular-nums lining-nums; font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--color-primary); color: #06231b; padding: 0.5rem 1rem;
  border-radius: var(--radius-sm); font-weight: 600;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------------------------------------------------------------------
   Layout shell
   --------------------------------------------------------------------- */

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem) clamp(3rem, 6vw, 5rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
}

.site-header__inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.brand__logo { width: 30px; height: 30px; flex-shrink: 0; color: var(--color-primary); }

.brand__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.brand__tag {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-controls { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  color: var(--color-primary-strong);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.live-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: currentColor;
  animation: pulse-dot 1.8s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 currentColor; }
  50% { opacity: 0.55; }
}

.theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }
.theme-toggle svg { width: 18px; height: 18px; }

/* ---------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------- */

.hero {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 2.5rem);
}

.hero__eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary-strong);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 1.2rem + 1.7vw, 2.35rem);
  letter-spacing: -0.015em;
  max-width: 42ch;
}

.hero__desc {
  margin-top: 0.75rem;
  color: var(--color-text-muted);
  max-width: 58ch;
  font-size: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
}

.hero__meta {
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}
.hero__meta span strong { color: var(--color-text-muted); font-weight: 600; }

/* ---------------------------------------------------------------------
   Section scaffolding
   --------------------------------------------------------------------- */

section { padding-block: clamp(1.5rem, 3vw, 2.25rem); }
section + section { border-top: 1px solid var(--color-divider); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.section-sub {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  max-width: 46ch;
}

.section-note {
  font-size: 0.78rem;
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* ---------------------------------------------------------------------
   KPI cards
   --------------------------------------------------------------------- */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}

@media (max-width: 920px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .kpi-grid { grid-template-columns: 1fr; } }

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 132px;
}

.kpi-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.kpi-card__label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.kpi-card__icon { width: 16px; height: 16px; color: var(--color-text-faint); flex-shrink: 0; }

.kpi-card__value {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.kpi-card__delta {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  font-weight: 600;
}
.kpi-card__delta.is-up { color: var(--color-primary-strong); }
.kpi-card__delta.is-flat { color: var(--color-text-faint); }
.kpi-card__delta svg { width: 13px; height: 13px; }

.kpi-card--accent { border-color: color-mix(in srgb, var(--color-primary) 35%, var(--color-border)); }

/* ---------------------------------------------------------------------
   Growth rate cards
   --------------------------------------------------------------------- */

.rate-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}
@media (max-width: 760px) { .rate-grid { grid-template-columns: 1fr; } }

.rate-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.rate-card__label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 0.65rem;
}

.rate-card__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  font-weight: 700;
  color: var(--color-primary-strong);
  letter-spacing: -0.01em;
}

.rate-card__unit {
  font-size: 0.85rem;
  color: var(--color-text-faint);
  font-weight: 500;
  margin-left: 0.35rem;
}

.rate-card__foot {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--color-text-faint);
}

.rate-card__bar {
  margin-top: 0.9rem;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  overflow: hidden;
}
.rate-card__bar-fill {
  height: 100%;
  width: 30%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  animation: sweep 2.4s ease-in-out infinite;
}
@keyframes sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(340%); }
}

/* ---------------------------------------------------------------------
   Chart panels
   --------------------------------------------------------------------- */

.panel-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1rem;
  align-items: start;
}
@media (max-width: 900px) { .panel-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem 1.1rem;
  box-shadow: var(--shadow-sm);
}

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}
.panel__title { font-weight: 600; font-size: 0.92rem; }
.panel__hint { font-size: 0.76rem; color: var(--color-text-faint); }

.chart-box { position: relative; width: 100%; height: 260px; }
.chart-box--sm { height: 220px; }

.donut-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.donut-box { position: relative; width: 100%; max-width: 220px; height: 220px; margin-inline: auto; }

.donut-center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  pointer-events: none;
}
.donut-center__value {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
}
.donut-center__label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

.legend-row {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  width: 100%;
}
.legend-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.82rem;
  padding: 0.15rem 0;
}
.legend-item__left { display: flex; align-items: center; gap: 0.55rem; color: var(--color-text-muted); }
.legend-swatch { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.legend-item__value { font-family: var(--font-mono); font-weight: 600; color: var(--color-text); }

.insight-box {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.insight-box strong { color: var(--color-text); }

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: 1.75rem;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.site-footer__methodology {
  max-width: 72ch;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  list-style: none;
  margin-bottom: 1rem;
}
.source-list a { color: var(--color-text-muted); text-decoration: underline; text-decoration-color: var(--color-border); text-underline-offset: 2px; }
.source-list a:hover { color: var(--color-primary-strong); text-decoration-color: currentColor; }

.site-footer__bottom { color: var(--color-text-faint); }